Compression-tank.



J. L. HOOKER. COMPRESSION TANK.

APPLICATION FILED MAR. 21. 1913 a. T 3 6 o 4. I o r w m E 1% M 6 W 1 W xn I b 0 u 5 m0 a 2' a a 0 t. m a" H m Mm J. I m u :m m m a n a a Q P m n7 u I To all whom it may concern:

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JOSEPH L. HOOKER, OF-

Specification of Letters. Patent.

Application filed March 27,: 1918. Serial No. 757,194.:

Be it known that I, JOSEPH L. HOOKER,

citizen of the United States, residing at Anderson, in the county ofMadison and State of Indiana, have invented certain new and usefulImprovements in Compression- Tanks, of which the following is aspecification.

This invention relates to improvements in I applying the paint.

Another object of the invention is to provide a simply constructeddevice which includes a receptacle for compressed air containing thepaint receptacle, a tube for conducting the paint from the receptacle,and means whereby the air blast is utilized to free the conductor frgmsurplus-paint or other liquid after the operation.

With these and other objects in view the,

invention consists in certain novel features of construction ashereinafter shown and described and then specifically pointed out in theclaim, and in the drawings illustrative of the preferred embodiment ofthe invention.

Figure 1 is a sectional elevation of the improved device. Fig. 2 is aplan view with the tubes in section on the line 22 of Fig. 1.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The improved device comprises a receptacle of any suitable material, butsufficiently strong to withstand the necessary air pressure, andprovided wit an outstanding rim or flange 11 to which t e closure 12 1ssecured by clamp screws 13 or other similar suitable devices, and with apacking ring 14 between the closure and the rim to insure the necessaryair tight connection between the closure and the tank. The tank isdesigned-to receive :trated eonventionall a paint receptacle, illusat15, and resting Zupon the bottom of t e tank. Connected to ;the closure12 are packing-devices 1617 to ireceive tubes 18-19. H The tube 18is"ex-- tended nearly to the bottom of the casing ';10 and within thereceptacle 15, and preferably bearing upon the bottom of the latter,

,an provided with notches oro enings 20 to permit the paint to freelyflow into the tube. The tube 19 is the air tube-of the improved deviceand is provided at its upper-end with a T connection 21 having athreaded air tube coupling 22 and a check valve 23', The air tube isindicated conventionally at 24 and is coupled to the threaded connection22 by a coupling member 25 of the usual construction. 4

The tube 18 is provided witha paint controlling valve 26 externally ofthe closure 12 and terminates in a\T coupling 27. Located between the Tcouplings -21 and 27 is a branch 28 having an air controlling valve 29therein. Another branch 31 is con- Patna 0a. 20', 1914;

nected to the opposite end of the T member 27, and carries a flexibletube 32 which forms a conduit for the paint which is led thence to asuitable brush device, the latternot being shownas it forms no part ofthe present invention.

When the improved device isto be employed the closure 12 together withthe attached tube-s 18-19 are removed and the receptacle l5 depositedwithin the tank, The

closure12. is' then replaced upon the tank with the pipe 18 extendinginto the receptacle '15 and terminating relatively close to the bottomof the same, and the clamp devices 13 applied to render the tank airtight. The valves 26-29 are, then closed and air pressure suppliedthrough the tube 21, the

pressure of air displacing the valve 23 and passing thence through thetube 19 into the tank and forcing a portion of the paint into the tube18 until it is stopped by the closed valve 26.

A suitable air gage, indicated conventionally at 33, is preferablyattached to the tank to denote the pressure, and when the gage denotesthe requisite pressure the air pres sure is temporarily shut off fromthe tube 24, the air valve being automatically closed. The, valve 26 isthen slowly opened to permit'the paint to escape into the tube 32, thepressure in the tank forcing the paint through the tube 18 to the brush.As the pressure in the tank decreases the supply is replenished byopening the controllmg valve of the tube 21 and the pressure in the tankis thereafter maintained at a uniform degree until the paint isexhausted from the' receptacle 15. When this takes place the airpressure is shut off and the closure 12 again removed and a new canofpaint deposited in the tank, and the operation repeated. After thepainting operation is completed the valve 26 is closed and the valve29opened to permit a blast of compressed air to flow through the hose 32and drive out any surplus paiut which may remain therein, and thuscleanse-thewhose and brush and prevent the'lclogg-ingof the same-bydried paint.

The tank 10 andthe receptacle 15 may be of any requiredsize andcapacity. The de vice is adapted for the use of any required liquid, butvWilLgenerally be employed for supplying paint to a pneumatic brush, asbefore stated.' By this arrangement the paint is discharged directlyfrom the original packages or receptacles, and does not come in contactwith the tank, so that the same tank and its connections may be employedfor paints of various colors or shades, without the necessity forcleansing the tank. This is an important advantage and materiallyincreases the efliciency and utility.

Particular attention is directed to the arrangement of the check valve23 with reference to the branch pipe 28, the branch pipe 28 beinginterposed inand communicating with the air intake tube 19 intermediatethe check valve 23 and the compression tank 10. By this construction,the air intake pipe 24 may be disconnected and the air contained withinthe tank 10 under compression, may be forced through the branch pipe 28and out through the hose 32 to cleanse the hose and the brush connectedthereto of any res idue of paint, the check valve 23, in this operation,preventing the escape of the air through the exterior open end of thecoupling 25. It will also be noted that, in the operative position ofthe closure 12 upon the tank 10, the free extremity of the dischargetube 18 is disposed to rest against the bottom of the bucket 15, thusholding the bucket in-a relatively stationary position within the tank.Furthermore, in thus arranging'the discharge tube 18 to extend adjacentthe bottom of the compression tank, the apparatus is capable of emptyingpaint buckets ofv various heights.

The improved struction, can be inexpensively manufactured and applied,and will be found very useful for the purposes described.

Having thus described the invention, what is claimed is: I

In a device of the character described, a compressed air receiver havingside and bottom walls, a removable cover for the receiver, an air inletpipe carried by the cover, a discharge pipe carried by the cover, saidpipes extending downwardly into the receiver when the cover is inassembled position, a check valve interposed inthe air inlet pipe, abranch pipe communicant with both the air inlet pipe and the dischargepipe, one extremity of said branch pipe being connected with the airinlet pipe adjacent the check valve and intermediate said valveapparatus is simple in conand the cover, a valve interposed in the"tainer disposed within the air receiver and,

supported by the bottom wall thereof, said container having side andbottom walls and being arranged to receive the inner extremity of thedischarge pipe in the operative position of the cover upon the receiver,theterminal of said discharge pipe being disposed to bear against thebottom wall of the container. i

In testimony whereof I affix my signature in presence of two witnesses:

JOSEPH L. HOOKER.

